Hi,
in the meantime I had converted the swagger file to version 3.0 and uploaded it into Portal Management. The upgraded swagger file causes no error. I don’t know if this information will help you in finding the reason for the error message.

Sorry I should have been clearer, don’t worry about the URL he pasted in, this was just a mistake as he had the wrong thing in his clipboard.

The important thing to note is just that you have to explicitly click on the “From Swagger File” tab first, and then you can paste in the original swagger file that you sent in the first post on here and it should work